This analysis quantifies relationships between SPCC 1.0 Refined Smoothed Roadway Segments and flood hazard areas identified in FEMA’s Flood Insurance Rate Map (FIRM). For this analysis, FIRM GIS data for the state of Florida were obtained from the FGDL data repository in March 2021. This analysis identified the floodplain of each roadway segment using the roadway centerline’s relationship to FIRM polygons.
The following map presents all roadway segments in the SPCC 1.0 Refined Smoothed dataset, symbolized based on the FEMA floodplain classification zone that it resides within. In cases where a roadway segment crossed more than one zone, the roadway segment was split.
The following table and charts present the presence of the five FEMA floodplain classifications for each SPCC 1.0 Refined Smoothed classification.
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SPCC 1.0
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FEMA Floodplain Designation
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|---|---|---|---|---|---|
| SPCC 1.0 | 100-Year Floodplain | 500-Year Floodplain | Open Water | Outside Floodplain | Undetermined |
| C1 - Natural | 578,930 | 29,462 | 1,225 | 1,286,851 | 304,946 |
| C2 - Rural | 547,684 | 50,376 | NA | 2,000,444 | 105,457 |
| C3C- Suburban Commercial | 375,450 | 306,268 | NA | 1,817,626 | NA |
| C3R - Suburban Residential | 913,531 | 1,002,877 | NA | 4,578,678 | 62,882 |
| C4 - Urban General | 963,239 | 1,795,710 | NA | 3,401,447 | NA |
| C5 - Urban Center | 33,538 | 38,217 | NA | 56,099 | NA |
| C6 - Urban Core | 28,926 | 24,474 | NA | 27,932 | NA |
| Special District | 15,231 | 7,362 | NA | 46,193 | NA |